031  
WTPZ33 KNHC 231137  
TCPEP3  
 
BULLETIN  
TROPICAL STORM OTIS INTERMEDIATE ADVISORY NUMBER 4A  
NWS NATIONAL HURRICANE CENTER MIAMI FL EP182023  
700 AM CDT MON OCT 23 2023  
 
...OTIS FORECAST TO APPROACH THE SOUTHERN COAST OF MEXICO BY  
MIDWEEK...   
..HEAVY RAINFALL EXPECTED TO BE THE MAIN THREAT.
 
 
 
SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION  
----------------------------------------------  
LOCATION...11.7N 97.3W  
ABOUT 400 MI...640 KM SSE OF ACAPULCO MEXICO  
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H  
PRESENT MOVEMENT...N OR 355 DEGREES AT 5 MPH...7 KM/H  
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES  
 
 
WATCHES AND WARNINGS  
--------------------  
CHANGES WITH THIS ADVISORY:  
 
NONE.  
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:  
 
A TROPICAL STORM WATCH IS IN EFFECT FOR...  
* LAGUNAS DE CHACAHUA TO TECPAN DE GALEANA  
 
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE  
POSSIBLE WITHIN THE WATCH AREA, GENERALLY WITHIN 48 HOURS.  
 
INTERESTS IN ELSEWHERE IN SOUTHERN AND SOUTHWESTERN MEXICO SHOULD  
MONITOR THE PROGRESS OF THE OTIS.  
 
FOR STORM INFORMATION SPECIFIC TO YOUR AREA, PLEASE MONITOR  
PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE.  
 
 
DISCUSSION AND OUTLOOK  
----------------------  
AT 700 AM CDT (1200 UTC), THE CENTER OF TROPICAL STORM OTIS WAS  
LOCATED NEAR LATITUDE 11.7 NORTH, LONGITUDE 97.3 WEST. OTIS IS  
MOVING TOWARD THE NORTH NEAR 5 MPH (7 KM/H). A NORTH-NORTHWESTWARD  
TO NORTHWARD MOTION IS EXPECTED DURING THE NEXT FEW DAYS. ON THE  
FORECAST TRACK, THE CENTER OF OTIS WILL BE APPROACHING THE SOUTHERN  
COAST OF MEXICO LATE TUESDAY INTO WEDNESDAY.  
 
MAXIMUM SUSTAINED WINDS ARE NEAR 45 MPH (75 KM/H) WITH HIGHER  
GUSTS. GRADUAL STRENGTHENING IS FORECAST DURING THE NEXT COUPLE OF  
DAYS.  
 
TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 70 MILES (110 KM)  
FROM THE CENTER.  
 
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1002 MB (29.59 INCHES).  
 
 
HAZARDS AFFECTING LAND  
----------------------  
KEY MESSAGES FOR OTIS CAN BE FOUND IN THE TROPICAL CYCLONE  
DISCUSSION UNDER AWIPS HEADER MIATCDEP3 AND WMO HEADER WTPZ43 KNHC  
AND ON THE WEB AT HURRICANES.GOV/TEXT/MIATCDEP3.SHTML  
 
RAINFALL: OTIS IS EXPECTED TO PRODUCE RAINFALL TOTALS OF 5 TO 10  
INCHES WITH MAXIMUM AMOUNTS OF 15 INCHES ACROSS GUERRERO AND THE  
WESTERN COASTAL SECTIONS OF OAXACA. THIS RAINFALL IS LIKELY TO  
PRODUCE FLASH AND URBAN FLOODING, ALONG WITH MUDSLIDES IN AREAS OF  
HIGHER TERRAIN.  
 
WIND: TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH  
AREA BY TUESDAY NIGHT.  
 
SURF: SWELLS GENERATED BY OTIS WILL BEGIN TO AFFECT PORTIONS OF THE  
SOUTHERN COAST OF MEXICO BY LATE TUESDAY. THESE SWELLS ARE LIKELY  
TO CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE  
CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.  
 
 
NEXT ADVISORY  
-------------  
NEXT COMPLETE ADVISORY AT 1000 AM CDT.  
 

 
FORECASTER CANGIALOSI/BUCCI  
 
 
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